code: def test_accept_data_bounds(self):
      a = self.A(
          initial_viewport=maps.InitialViewport.from_data_bounds()
      )
      assert a.initial_viewport == "DATA_BOUNDS"
  
file_path: gmaps/gmaps/tests/test_maps.py
imports: import unittest
  import traitlets
  from ..None import maps, heatmap_layer
label_desc: Use image node_id 2 for calling the InitialViewport obj's underlying member method code with example usage: obj.test_accept_data_bounds() without return types